Pump



Nav. 27, 1934.'

L. M. COTCH ETT PUMP v Filed sept. 15, 1953 Il JAN VIV Patented Nov.2,7, 1934 c PUMP l Louis 'M. Cotchett, Hingham, Mass., assignor to-Textile -Patent & Process Company, Boston,

Mass., a corporation of Massachusetts' Application September 13, 1933,Serial No. 689,243

5 Claims.

, The present invention relates to hand-operated pumps and the like,which have particular adaptation 'for the atomization of fluids such ascleaning fluids, perfume, insecticides and others. The

5 pump is readily adaptable to a compactI form `of fluid container, andoperates with greater eiliciency' and less likelihood of deteriorationthan the usual form of pump or rubber bulb atomizer employed for such apurpose. Y

'I'he various features consi-st`in certain novel features ofconstruction, combinations and arrangements of parts more particularlydescribed hereafter and set forth in the accompanying claims.

In the drawing illustrating the preferred form of the invention, Fig. lisa side elevation of a fluid container and applied atomizing or pumpingunit; and Fig. 2 is an elevation in section upon an enlarged scale ofthe same unit illustrating the internal construction of the pumpReferring particularly to-the illustrated embodiment of the invention,the fluid may be contained in a suitable form of container sucl as a.glass member 10, having a ribbed top portion 12 closed by a detachablecap 14 threaded tothe top at`16to approximately seal the container. The

pumping element is mounted directly in the cap 14 through the provisionof a guide sleeve 18 depending centrally of the cap and locked theretoby a disk 20 receivedin a shouldered portionA of the sleeve, and by aspun-out flange 22 engaging with the opposite side of the cap, as willbe selfevident. Sliding freely within the sleeve is a chamber 26 ventedat its upper end through an atomizing plug 28 sealed within the plungerand having an atomizing vent 3 in the outer end. The interior of theplug 4is in free communication with the chamber 26. which is normallyclosed at its lower end by a ball check valve 32, resting upon aV seat34 formed in a plug 136. The plug is capable of sliding within thechamber 26, and is E normally retained in the lowermost position shownin the drawing by a coil spring 38, the downward `movement being limitedby an inturned shoulder 40 formedvon the plunger.

Connected with the plug 36 and projecting downwardly from the pump unitis a replenishing tube or inlet connection 42 of sufficient length toextend approximately to the bottom of the container as indicated, the'tube having an opening 44 to admit liquid thereinto even though the endof the tube contacts with the bottom.

In practice, after the assembly is mounted upon hollow plunger 24,provided with an internal the container, depression of the plunger bypressure upon the surface contracts the chamber 26 and causes fluidtherein to be ejected forcibly through the atomizing jet 30,v the ball32 seating to prevent egress from the chamber in this direction. Uponrelease. of the plunger 50 and return by the spring 38, sufcient suctionis created to draw fluid upwardly through the tube 42 and ball check 32to replenish the chamber interiorly. Thereafter depression .of theplunger again ejects fluid, and the operation may be repeated asdesired.

It will be evident that with this construction the element may bereadily interchanged between containers, is compact, fool-proof, and byproper formation of the cap'may be applied to any form or size ofcontainer. The pump is particularly adaptableto containers of smallVolume which are portable and may be held in the hand for directing theatomizing jet as desired.

When not in use the upward movement of the plunger 24 under the actionof the spring 38 is limited by an out-turned shoulder 52, which engageswith the lower end of the guide sleeve' 1 8. Obviously this upwardmovement may be caused by engagement of the tube 42 with the bottom ofthe container, 'causing the spring 38 to thrust upwardly on thesurrounding plunger.

What is claimed is:

l. The combination with a container designed as a fluid reservoir of a.cap detachably closing the container, a hollow plunger forming a chambersliding in the Acap and carrying a delivery outlet from the chamber toatmosphere, a fluid conducting tube extending from the interior of `theplunger into the container and slidably engaged with the plunger toreplenish the plunger interiorly, and means for resiliently moving theplunger in a direction to expand the chamber therewithin.

2. The combination with a fluid container of. a cap detachably sealingthe container, a. guide sleeve on the cap, a hollow plunger slidingwithin the sleeve and providing an expansible chamber, anY atomizingoutlet connecting the chamber with atmosphere, a fluid lead-in tube`communicating `with said container and -slidingly connected with thechamber of the plunger at the inner end, a valve for closingjcommunication between the chamber and the lead-in tube on movementinwardly of' said plunger, and a spring mounted in thechamber fornormally maintaining the chamber expanded.

3. A fluid pumping unit comprising a hollow plunger forming a chamber, aguide within which closing the chamber within the plunger at one end, auid inlet communicating with the slidable closure, a spring in thechamber-for normally maintaining the slidable closure at the end of thechamber, an outlet from the opposite en d of the chamber, and a valvefor closing communication with the inlet upon contraction of the chamberwithin .the plunger.

4. The combination with a iluid container of a detachable closure forthe container, a chambered plunger slidably mounted upon-the closure andhaving a delivery opening to atmosphere .at the outer end, a fluidlead-in tube within the co'ntainer and extending to fthe inner end ofthe plunger, means for slidably sealing the lead-in tube to the interiorof the plunger to closethe chamber therein, means within the chamber oftheplunger for normally thrusting the lead-in tulbe against .thecontainer to provide a. xed base against which the chamber can becontracted,

1,982,497 the plunger slidably moves, means for slidably and a valveclosing the inlet tube on contraction of the chamber.

` 5. The combination with a liquid container -of a closure therefor, ahollow plunger slidingly mounted in the closure and closed at its outerend except for .the provision of a restricted delivery outlet connectinga chamber within the plunger to atmosphere, a liquid lead-in tubeslidingly supported at the inner endl of fthe plunger to close thechamber 'therewithin, means upon the plunger for the connected end ofthe lead-in tube from disengagement from the plunger, a spring supportedwithin the chamber of the plunger for normally expanding the chamber bymoving the plunger outwardly with respect to the lead-in tube, and. avalve for closing communication between the lead-in tube and plungerchamber upon movement ofthe plunger to contract the chamber.

LOUIS M. COTCHETT.

